The gang gets together to celebrate Sam's 40th birthday, where Lisa suffers a crisis of conscience and Nick's announcement catches everyone off guard.

Facing a brutal deadline, Ethan brainstorms ideas for his Y.A. novel. Meanwhile, Sam, Lisa and Marianne meet some admirers out on the town.

Ethan and Lisa run the gauntlet to ensure their IVF is a success. Max and Felix celebrate a special occasion. Sam opens up.

Ethan organizes a wine-tasting trip for his wife and friends, but his perfectly planned excursion hits a few bumps in the road.

Tensions flare, suspicions grow and mics drop at a lavish wedding reception, where Ethan takes his new persona out for a spin.

Lisa makes a big decision, Ethan and Sam reminisce about old times, Nick plays a prank, and Max makes an awkward confession.

Lisa's new career gets off to a dubious start. Meanwhile, Marianne prepares for a play and Ethan proves himself a less-than-stellar petsitter.

Lisa and Ethan move to New York, reconnect with old college friends and learn that some secrets are harder to keep than others.